Recent content by jackleyt

Thanks! It was the latter of the two.

Homework Statement The sound source of a ship's sonar system operates at a frequency of 23.0 kHz. The speed of sound in water is 1482 m/s. What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at...

Homework Statement One end of a horizontal string is tied to a wall, and the other end is tied to an object with weight W that hangs over a pulley to hold the string taut. The object is large enough that the string never moves at the pulley. Under these conditions, the string vibrates with...

Oh, another question.. for the last part, I'm just plugging and chugging in the numbers to the equation .07sin(-157t+19.6x), and I'm getting -.0124. It says it's wrong. Am i doing something wrong?

Nevermind, got it, thanks!

Oh! So I've gotten .07sin(157t-19.6x), but it's telling me it's wrong.??

I don't know :/.. is there any other way you could explain it? I'm sorry, it's late and I feel so slow!

Can you explain overtones?

A=.07 K= I'm not sure, but wouldn't x be zero so k would cancel out? W= i don't know how to go about finding.

Homework Statement Transverse waves on a string have wave speed 8.00 {\rm m/s}, amplitude 0.0700 {\rm m}, and wavelength 0.320 {\rm m}. These waves travel in the x direction, and at t = 0 the x = 0 end of the string is at y = 0 and moving downward. Find the frequency of these waves...

Homework Statement Standing sound waves are produced in a pipe that is 1.60 {\rm m} long. 1) the pipe is closed at the left end and open at the right end , determine the locations along the pipe (measured from the left end) of the displacement nodes for the first overtone. 2) If the pipe is...

Homework Statement An organ pipe has two successive harmonics with frequencies 1760 Hz and 2160 Hz. Is this an open or stopped pipe? Which two harmonics are these? What is the length of the pipe? Homework Equations L=v/2f The Attempt at a Solution I'm really just having trouble...

*How long until the species have the same mass? Sorry.

Homework Statement Species A doubles every 2 hours and initially there are 6 grams. Species B doubles every 5 hours and initially there are 14 grams. Homework Equations The Attempt at a Solution I've tried graphing this, but I don't think I have the right equations down. I don't...

Homework Statement A water tank is a rectangular box with a base which is square of side length 5 meters. At t=0 hours it has water to a depth of 2 meters. The rate water flows into the tank after t hours is 1+(t/2) m^3/hr. Make a graph of this on graph paper. Use your graph to find the depth...